Baker s oven



No. 627.l25. Patented June 20,1899.

A. A. KNIGHTS.

BAKERS OVEN. (Application filed .n me a, 1898.) (No Model.) 2 SheetsShgat l.

1166381, Invenibr,

Alonzo f]. Knights;

1% I His flttdrng A. A. KNIGHTS. -B-AKERS OVEN.

(Application filed June 8, 1898.)

Invenib'r,

Alonzo .H.

' llNrrn in STATES PATENT OFFICE.

BAKERS OVEN.

SPECIFICATION forming part of Letters Patent No. 627,125, dated June 20, 1899. Application filed June a, 1898. Serial No. 682,915. (No model.)

To all whom it may concern! Be it known that I, ALONZO A. KNIGHTS, a citizen of the United States, residing at Melrose, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Bakers Ovens, of which the followingis a full, clear, and exactdescription.

This invention relates to bakersovens, and pertains to means whereby the roof is made more durable than ever before accomplished.

' In ovens of this character it is customary to cated at other portions of the ceiling.

'far Without success.

form the roof or ceiling of large tiles or bricks supported upon metal girders or T-beams; but inasmuch as the heat enters the oven at one corner and escapes through a flue at the opposite corner the girders and tiling at said first corner receive an excessive quantity of heat as compared with the same parts 10- Consequently the girders and tiling at such point burn out more quickly than the others. It has been attempted to overcome this, but thus By my invention, however, this difficulty has been entirely overcome and the Whole oven-ceilin g made to Wear evenly.

Referring to the drawings forming part of this specification, Figure 1 is a perspective View, partly in section, illustrating my ovenceiling. Fig. 2 is a detail cross-section of my roof. Fig. 3 is a side elevation of one of the girders of the roof. Fig. 4 is a transverse section of said girder on the line X X in Fig. 3. Fig. 5 is an end view of one of the thick tiles used in the roof, and Fig. 6 is an end View of one of the thin tiles.

As shown in Fig. 1, the ceiling is composed of the tiles M M M supported upon the flanges of the girders L. Said girders rest at their ends upon the walls K, (represented in Fig. 1 as of brick or tiling,) but not necessarily so, for the reason that I preferably use my invention in connection with what are termed portable bakers ovens, which are part tiling and part metal. V

' As indicated in Fig. 1, the furnace F of the oven is located at one corner of the oven, While the flue ffor the escape of the products of combustion is at the diagonally opposite corner. Hence the ceiling directly over the furnace F receives the injurious elfect of the most intense portion of the heat. The tilings M at such point are therefore made of unusual thickness. The tilings M next thereto are somewhatless thick, and the tilings M of the remainder of the ceiling are the thinnest.

Myinvention has for its object the construction of a girder by means of which these different thicknesses of tiling can be supported with their under surfaces flush, While at the same time the girder itself is protected from the eifect of the intense heat arising directly from the furnace.

Referring to Figs. 1, 3, and 4, it will be seen that the girders which are designed t0 sup port the ceiling-tiles more nearly over the fur nace F are each formed with a series of flanges stepped out of plane with one anotherthat is, a girder L is formed with flanges Z located atasornewhat higher level than the flanges Z, and Z similarly higher than Z Furthermore, the tiles M which are designed to be held by the flanges Z are made considerably thicker than the tiles M designed to be held by the flanges Z, while the tiles M are but half the thickness of the tiles M. The tiles M M are formed withthe grooves or notches m at their ends, adapted to receive the flanges Z Z", and the relative heights of said flanges are made such that when the tiles M M-are supported by their notches an engaging said flanges the under faces of said tiles are brought in the same plane. Moreover, all three of the flanges of each tile are so arranged that not only are the tiles M M flush with each other, but the tiles M resting upon the flanges Z. are brought flush with the others at their under faces. I further thicken the vertical web of the girders L in the vicinity of the points where the flanges are offset one from the other in order to compensate for the lessening of the girders strength by the discontinuance of the flanges. By thus arranging the tiles and girders I am enabled to have a perfect smooth ceiling which is thickest at the point of greatest exposure and the tiling composing the same thereby made to endure equally well throughout the entire extent of the ceiling. Further, the girders are themselves fully protected from the most intense portions of the heat by the same arrangement of the tiling.

WVhat I claim as my invention, and for which I desire Letters Patent, is as follows, to Wit:

1. In an oven, the combination of the girders having the plurality of flanges stepped or offset with respect one to the other, and the tiles having the terminal notches adapted to engage said flanges, the tiles held by one set of 'flanges being thicker than the tiles held by another, whereby the under faces of said tiles are all made uniform, while their relative thicknesses are Varied in accordance with the 10 intensity of the heat to which the various sections of the oven-ceiling are subjected, substantially as set forth.

2. In an oven, the combination of the tiles,

ALONZO A. KNIGHTS.

Witnesses:

A. 13. UPHAM, G. ALEXANDER. 

